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Understanding Cladistics: Evolutionary Relationships of Organisms

Explore the method of classification based on shared characteristics and how cladograms depict evolutionary connections between species. Discover which organisms possess specific traits and their relatedness within the biological world.

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Understanding Cladistics: Evolutionary Relationships of Organisms

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  1. CLADOGRAMS

  2. CLADISTICS • Amethod of classification of animals and plants according to the number of characteristics that they have in common. • It is assumed that the greater the number of characteristics that two organisms share, the more recently they diverged from a common ancestor.

  3. CLADOGRAM • Abranching diagram showing the evolutionary relationship between a number of species.

  4. Which organisms have hair? • Which organisms have jaws? • Which organisms have jaws, four walking legs, and amniotic eggs?

  5. Which organisms have vertebrae? • Which organisms have four limbs? • Which organisms are most closely related?

  6. Which of the following is NOT a characteristic of mice? • Backbone • Lungs • Fur • Opposable thumb

  7. Which organisms are most closely related? • Fish and lizards • Salamanders and mice • Humans and chimpanzees • Humans and fish

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